Cloud Hypervisor

Cloud Hypervisor runs Linux and Windows guests on top of KVM or Microsoft Hypervisor, trading the broad device support of a full emulator for a lean, security-focused VMM aimed at modern cloud workloads. Minimal emulation means low latency, a small memory footprint, and a reduced attack surface.

Guests boot from a kernel directly or through firmware, on x86-64 and AArch64 with experimental riscv64. CPU, memory, and PCI devices can be hotplugged into a running VM, devices are offloaded over vhost-user, and VMs can migrate from one machine to another.

Written in Rust on top of the rust-vmm crates, it ships as pre-built binaries and as packages for some Linux distributions via Open Build Service. The API and command line carry stability guarantees. Released under Apache 2.0 with a BSD-3-Clause component.